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3,818 km · Domestic

Philadelphia (PHL) – Seattle–Tacoma (SEA)

In July 2026, 359 flights operated between Philadelphia and Seattle–Tacoma (both directions), and 71.3% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January77126▲ 63.6%
February68106▲ 55.9%
March143147▲ 2.8%
April164227▲ 38.4%
May185314▲ 69.7%
June231339▲ 46.8%
July236359▲ 52.1%
August269––
September243––
October242–in progress
November174––
December184––
Year to date (Jan–Jul)1,1041,618▲ 46.6%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January74.0%73.8%▼ 0.3%
February83.8%87.7%▲ 4.7%
March86.7%73.5%▼ 15.2%
April77.4%89.9%▲ 16.1%
May69.7%80.9%▲ 16.1%
June67.1%79.9%▲ 19.1%
July65.7%71.3%▲ 8.5%
August73.6%––
September79.0%––
October79.8%–in progress
November83.9%––
December71.7%––
Year-to-date average (Jan–Jul)74.9%79.6%▲ 6.2%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January09–
February440.0%
March04–
April01–
May01–
June18▲ 700.0%
July10100.0%
August3––
September0––
October4–in progress
November0––
December2––
Year to date (Jan–Jul)1537▲ 146.7%

Airlines on this route

  1. Alaska Airlines 53.5%
  2. American Airlines 42.7%
  3. Delta Air Lines 3.8%

Oct 1, 2024 – Jul 31, 2026

By direction

PHL → SEA

Scheduled flights
2,154
Flights operated
2,120
Cancelled
34 · 1.6%
On-time departures
76.2%

SEA → PHL

Scheduled flights
2,155
Flights operated
2,128
Cancelled
27 · 1.3%
On-time departures
77.3%

PHL → SEA and SEA → PHL counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Alaska Airlines AS 2,304 53.5% 76.6% 26
American Airlines AA 1,840 42.7% 76.4% 34
Delta Air Lines DL 165 3.8% 82.3% 1

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay07:00–08:008.2min · 520 recorded · 518 measured
Gap to highest-delay hour15.8min07:00 ↔ 19:00
Recorded flights4,309PHL–SEA

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 105 recorded · 101 measured · Source: the US BTS 07:00 · 82.8% · 520 recorded · 518 measured · Source: the US BTS 08:00 · 85.9% · 389 recorded · 383 measured · Source: the US BTS 09:00 · 78.6% · 640 recorded · 636 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · 74.9% · 224 recorded · 223 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 3 recorded · 3 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 71 recorded · 67 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 34 recorded · 34 measured · Source: the US BTS 18:00 · 72.8% · 948 recorded · 928 measured · Source: the US BTS 19:00 · 63.4% · 279 recorded · 273 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · 76.6% · 516 recorded · 512 measured · Source: the US BTS 22:00 · 76.1% · 406 recorded · 397 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 172 recorded · 171 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 105 recorded · 101 measured · Source: the US BTS 07:00 · 8.2 min · 520 recorded · 518 measured · Source: the US BTS 08:00 · 9.4 min · 389 recorded · 383 measured · Source: the US BTS 09:00 · 8.7 min · 640 recorded · 636 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · 12.0 min · 224 recorded · 223 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 3 recorded · 3 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 71 recorded · 67 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 34 recorded · 34 measured · Source: the US BTS 18:00 · 14.8 min · 948 recorded · 928 measured · Source: the US BTS 19:00 · 24.0 min · 279 recorded · 273 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · 10.3 min · 516 recorded · 512 measured · Source: the US BTS 22:00 · 10.5 min · 406 recorded · 397 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 172 recorded · 171 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 105 · 105 recorded · 101 measured · Source: the US BTS 07:00 · 520 · 520 recorded · 518 measured · Source: the US BTS 08:00 · 389 · 389 recorded · 383 measured · Source: the US BTS 09:00 · 640 · 640 recorded · 636 measured · Source: the US BTS 10:00 · 2 · 2 recorded · 2 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · 224 · 224 recorded · 223 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · 3 · 3 recorded · 3 measured · Source: the US BTS 16:00 · 71 · 71 recorded · 67 measured · Source: the US BTS 17:00 · 34 · 34 recorded · 34 measured · Source: the US BTS 18:00 · 948 · 948 recorded · 928 measured · Source: the US BTS 19:00 · 279 · 279 recorded · 273 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · 516 · 516 recorded · 512 measured · Source: the US BTS 22:00 · 406 · 406 recorded · 397 measured · Source: the US BTS 23:00 · 172 · 172 recorded · 171 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:00Fewer than 200 measured departures—101105
07:0082.8%8.2 min518520
08:0085.9%9.4 min383389
09:0078.6%8.7 min636640
10:00Fewer than 200 measured departures—22
11:00No observations———
12:0074.9%12.0 min223224
13:00No observations———
14:00No observations———
15:00Fewer than 200 measured departures—33
16:00Fewer than 200 measured departures—6771
17:00Fewer than 200 measured departures—3434
18:0072.8%14.8 min928948
19:0063.4%24.0 min273279
20:00No observations———
21:0076.6%10.3 min512516
22:0076.1%10.5 min397406
23:00Fewer than 200 measured departures—171172

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 73.8% · 636 recorded · 627 measured · Source: the US BTS Tuesday · 81.8% · 591 recorded · 583 measured · Source: the US BTS Wednesday · 81.1% · 597 recorded · 587 measured · Source: the US BTS Thursday · 73.1% · 635 recorded · 625 measured · Source: the US BTS Friday · 73.1% · 638 recorded · 627 measured · Source: the US BTS Saturday · 79.4% · 579 recorded · 574 measured · Source: the US BTS Sunday · 75.8% · 633 recorded · 625 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 12.5 min · 636 recorded · 627 measured · Source: the US BTS Tuesday · 10.4 min · 591 recorded · 583 measured · Source: the US BTS Wednesday · 8.2 min · 597 recorded · 587 measured · Source: the US BTS Thursday · 12.6 min · 635 recorded · 625 measured · Source: the US BTS Friday · 15.7 min · 638 recorded · 627 measured · Source: the US BTS Saturday · 9.0 min · 579 recorded · 574 measured · Source: the US BTS Sunday · 15.8 min · 633 recorded · 625 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 636 · 636 recorded · 627 measured · Source: the US BTS Tuesday · 591 · 591 recorded · 583 measured · Source: the US BTS Wednesday · 597 · 597 recorded · 587 measured · Source: the US BTS Thursday · 635 · 635 recorded · 625 measured · Source: the US BTS Friday · 638 · 638 recorded · 627 measured · Source: the US BTS Saturday · 579 · 579 recorded · 574 measured · Source: the US BTS Sunday · 633 · 633 recorded · 625 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday73.8%12.5 min627636
Tuesday81.8%10.4 min583591
Wednesday81.1%8.2 min587597
Thursday73.1%12.6 min625635
Friday73.1%15.7 min627638
Saturday79.4%9.0 min574579
Sunday75.8%15.8 min625633

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 73.9% · 212 recorded · 203 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 182 recorded · 174 measured · Source: the US BTS Mar · 80.0% · 294 recorded · 290 measured · Source: the US BTS Apr · 84.7% · 392 recorded · 391 measured · Source: the US BTS May · 76.8% · 500 recorded · 499 measured · Source: the US BTS Jun · 74.7% · 579 recorded · 570 measured · Source: the US BTS Jul · 69.1% · 615 recorded · 595 measured · Source: the US BTS Aug · 73.6% · 272 recorded · 269 measured · Source: the US BTS Sep · 79.0% · 243 recorded · 243 measured · Source: the US BTS Oct · 75.9% · 340 recorded · 336 measured · Source: the US BTS Nov · 86.7% · 322 recorded · 322 measured · Source: the US BTS Dec · 71.4% · 358 recorded · 356 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 15.1 min · 212 recorded · 203 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 182 recorded · 174 measured · Source: the US BTS Mar · 8.8 min · 294 recorded · 290 measured · Source: the US BTS Apr · 4.7 min · 392 recorded · 391 measured · Source: the US BTS May · 10.6 min · 500 recorded · 499 measured · Source: the US BTS Jun · 15.1 min · 579 recorded · 570 measured · Source: the US BTS Jul · 22.0 min · 615 recorded · 595 measured · Source: the US BTS Aug · 12.9 min · 272 recorded · 269 measured · Source: the US BTS Sep · 11.8 min · 243 recorded · 243 measured · Source: the US BTS Oct · 11.2 min · 340 recorded · 336 measured · Source: the US BTS Nov · 3.5 min · 322 recorded · 322 measured · Source: the US BTS Dec · 13.3 min · 358 recorded · 356 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 212 · 212 recorded · 203 measured · Source: the US BTS Feb · 182 · 182 recorded · 174 measured · Source: the US BTS Mar · 294 · 294 recorded · 290 measured · Source: the US BTS Apr · 392 · 392 recorded · 391 measured · Source: the US BTS May · 500 · 500 recorded · 499 measured · Source: the US BTS Jun · 579 · 579 recorded · 570 measured · Source: the US BTS Jul · 615 · 615 recorded · 595 measured · Source: the US BTS Aug · 272 · 272 recorded · 269 measured · Source: the US BTS Sep · 243 · 243 recorded · 243 measured · Source: the US BTS Oct · 340 · 340 recorded · 336 measured · Source: the US BTS Nov · 322 · 322 recorded · 322 measured · Source: the US BTS Dec · 358 · 358 recorded · 356 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan73.9%15.1 min203212
FebFewer than 200 measured departures—174182
Mar80.0%8.8 min290294
Apr84.7%4.7 min391392
May76.8%10.6 min499500
Jun74.7%15.1 min570579
Jul69.1%22.0 min595615
Aug73.6%12.9 min269272
Sep79.0%11.8 min243243
Oct75.9%11.2 min336340
Nov86.7%3.5 min322322
Dec71.4%13.3 min356358

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 75.7% 3,261
  • Delayed >15 min 22.9% 987
  • Cancelled 1.4% 61
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

31
31 of 31
Flight numbersBy direction DeparturesOn time
AS442 SEA → PHL 648 77.1%
AS443 PHL → SEA 616 73.3%
AA2001 PHL → SEA 267 66.7%
AS446 PHL → SEA 262 78.8%
AS371 SEA → PHL 228 78.5%
AS444 SEA → PHL 219 74.1%
AS370 PHL → SEA 163 83.4%
AA2361 PHL → SEA 154 72.7%
AA2361 SEA → PHL 129 68.8%
AA2870 PHL → SEA 122 90.1%
AA2760 SEA → PHL 119 80.7%
AA1358 SEA → PHL 90 74.7%
AA2870 SEA → PHL 88 72.4%
DL1114 SEA → PHL 82 84.0%
DL2092 PHL → SEA 82 81.7%
AA2522 SEA → PHL 72 78.3%
AA3219 SEA → PHL 72 84.1%
AA2534 PHL → SEA 71 81.7%
AA3259 PHL → SEA 71 62.3%
AA2522 PHL → SEA 67 57.8%
AA2534 SEA → PHL 65 64.6%
AS277 PHL → SEA 52 84.6%
AS522 SEA → PHL 52 73.1%
AA2763 PHL → SEA 44 90.9%
AA2763 SEA → PHL 44 90.9%
AA872 SEA → PHL 44 90.9%
AA888 PHL → SEA 44 93.2%
AA2311 PHL → SEA 36 90.6%
AA2358 SEA → PHL 36 87.9%
AA1095 SEA → PHL 33 81.8%
AA2841 SEA → PHL 33 78.8%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 359 +52.1% 10 71.3%
June 2026 339 +46.8% 8 79.9%
May 2026 314 +69.7% 1 80.9%
April 2026 227 +38.4% 1 89.9%
March 2026 147 +2.8% 4 73.5%
February 2026 106 +55.9% 4 87.7%
January 2026 126 +63.6% 9 73.8%
December 2025 184 +7.0% 2 71.7%
November 2025 174 +17.6% 0 83.9%
October 2025 242 +157.4% 4 79.8%
September 2025 243 0 79.0%
August 2025 269 3 73.6%
July 2025 236 10 65.7%
June 2025 231 1 67.1%
May 2025 185 0 69.7%
April 2025 164 0 77.4%
March 2025 143 0 86.7%
February 2025 68 4 83.8%
January 2025 77 0 74.0%
December 2024 172 0 70.9%
November 2024 148 0 89.9%
October 2024 94 0 66.0%

How to read this chart

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